Quick-acting warp stop mechanism for warpers



Oct. 18, 1927. A E

RHOADES,

QUICK ACTING WARP STOP MECHANISM FOR WARPERS 7 Filed Feb. 15. 1926 RAPIDLY ROTATING- ACTUATOR Fig. 2$-

LEVER SHIPPER lnvenror. Alonzo E. Fihocdes byM Maw Atrys.

Patented Oct.18, 1927,

1,646,363 PATENT OFFICE;

ALGNZO'E. RH OADES, OF IEIOPEDA'LE, MASSACHUSETTS, ASSIGNOR TO DRAPER COR- FOB'ATION, OFI-IOPEDALE, IVIASSAOHUSETTS, A CORPORATION OF MAINE;

ourox-Ac'rnveiw-imr sror MECHANISM roe WARPERS;

Application filed February 15, 1926. Serial No. 88,247.

This invention relates to improvements in quick-acting warp stop mechanisms for warpers having a transversely oscillating detector bar and the general object of the invention is to provide means formore quickly stopping the warper upon the falling of a drop wire than in previous constructions.

Breakage of the warp coming from the creel to the warper may occur near the beam uponwhich it is to be wound, or the warp may break in front of the stop motion and the trailing end be carried on to the beam. In usual constructions, where the stoppage of the warper isdelayed after detection of a broken warp, many yards of warp are apt to be carried along before the warper is completely stopped, so that in piecing the ends, it is almost impossible not to cross them, for, if the endsare wound around the beam and the broken end has to be found after it has been wound upon the beam, it is almost impossible to pieceup and keep the warps in line. Consequently frequently the warps are crossed. The present invention contemplates the stoppage ofthe warper in a small fraction of the time required for the stoppage of the ordinary warper, thereby preventing a run-over of the yarn and enabling the broken end readily to befound before it is wound upon the beam, thus avoiding acrossing of the warps.

More specifically the invention relates to improvements in warpers in which, one, or more usually two, detector bars extend transversely of the warper and are rigidly secured to a detector bar shaft which is mounted in the end frames of the warper and which is provided with a downwardly eX- tending arm which engages a device carried by a continually moving vibrator, which device is operable upon the arrest of the detector bars by a falling drop wire to initiate the action ofthe mechanism for stopping the warper. Tn usual constructions the drop wire bar is arrested by a falling drop wire in only one direction of its movement. The present invention contemplates the employment of a drop wire so constructed as to arrest the detector bar in either direction of its movement; in the usualconstruction the arrest of a detector bar actuates the device for initiating the action of the mechanism for stoppingthe warper during only one direction of movement of the vibrato-r. The present invention embodies mechanism for in- 'ly pending applications, Nos.

itiating the action of the'stop mechanism in either direction, of movement of the vibrator.

The invention further contemplates the provision of a continually moving'actuator having means operable atgreater' frequency than the frequency of movement of the vibrator to actuate the knock-off mechanism of the warpenupon arrest of the detector bar, thereby st ll more quickly effecting the stoppage of the warper.

The invention isillustrated herein as appliedto the general form; of warper disclosed in my prior Patent'No,1,254,936, granted January 29, 1918. It also embodies certain features disclosed in my concurrent- 87,643 and 87 ,64 1, filed February 11, 1926. T

,As the present invention relates merely to the warp stopv mechanism of warpers, only asufliclent portion of the warper is illustrated in theaccompanying' drawings to disclose the application of the to invention there In the drawings:

Fig. 1 is an elevation of a portion of one is of the usual type comprising end framesl.

and 2 which carry the usual mechanism of the warper and upon which is mounted the detector mechanism and the means operable thereby for effecting the stoppage of the warper. A bar 8 extending transversely between the end frames of the war-per is pro-- vided withv a seat 4 which supports the usual series of'blocks 5, in each of which a'plurality ofdrop wires 6 are pivotally mounted and retained in separated position. A usual,

restoring bar 7 isfcarried upon arms Swhi'ch are secured to a rockshaft 9. The bar 7' serves the double purpose of arresting the falling drop. wires in substantially a. horizontal position in the path of the vibrating detector and also acting, when moved'upwardly by the 'rockingof the shaft 9, to re turn a fallen, drop wire to normal position.

In usual constructions the ends of the drop wires are bent upwardly and then reversely to provide an eye for the warp. In the pres ent construction, the ends of the drop wires are bent in the reverse direction to provide an eye 10 presenting an outer shoulder 11 and an inner shoulder 12, each of which shoulders is adapted to engage and arrest the detector bar so that the detector bar would be arrested by a falling drop wire in either direction of its oscillatory movement. The oscillating detector bar 18 is in the form of a flat plate extending transversely across the warper in parallelism to the series of drop wires and desi ably is provided at its upper end with laterally extending flanges 1a and 15 adapted respectively to engage the shoulders 11 and 12 ofthe fallen drop wire and prevent the drop wire from being raised out of engagement with the detector bar 13. The detector'bar 13 is earned upon arms 16 which are fixedly secured toa detector bar shaft 17 which is join-nailed in suitable bearings 18 in the end frames 1 and 2 of the warpcr. One end of the detector bar shaft 17 is provided with a downwardly extending arm 19 which is keyed or otherwise fixedly secured thereto. The arm 19, and consequently the detector bar, is oscillated from the usual vibrator 01 the warper through novel controlling mechanism adapted upon the arrest of the detector bar to cause the actuation otiaknoclc-otl device tor'stopping the varper during either direction of movemento'f the vibrator. 1

In. the preferred construction illust 'ated herein, the lower end of the arm 19 is pro videdwith a Cylindrical offset member 20 which l rictionally engages a reentrant angle 21-011 the-upper faceot a controller 22 which is pivotally mounted upon a stud 23 extending from the end portion of an arm 24L'which extends laterally l'rom the upper end of: the vibrator 25 which is actuated by the arm 25 of the usual rock shaft 25". The controller is normally held inengageinent with the oil'- set member 20 of the arm 19 by aspiral spring 26 which seated "at its lower endin a socket in a boss uponthe elbow of the vibrator and at its upper end in a socket in a boss 28 preferably located imn'iediately beneath the reentrant angle of the controller. By reason of this construction, the frictional engagen'ientbetween the member 20 oi the arm 19 otthe detector bar shaft and the reentrantangle of the controller 22, the oscillating movement of the vibrator willnor mally be imparted to the detector shaft and thedetectorbars-which are carried thereby.

Upon arrest of the detector bar, the arm 19 will be heldfrom movement, and as the vibrator continues 1tsmovem'ent,;the member 20 will be caused to ride up upon one of the faces of the reentrant angle, thereby depressing the controller 22 againstthe action of its spring 26. This yielding moveeas es ment of the controller is employedto initiate the action ofthe mechanism for stopping the warper and it will be obvious that as this yielding movement occurs upon'arrest of the detector bar during either direction ofmove arrested by a falling drop wire, in either (ll? rection or its movement, so that 111 the mechanism thus described, the actuation of the stop mechanism is accomplished in one-t quarter of the time required in usual warp stop constructions.

The present invention, however, further conten'iplatesthe provision'of meansfor still more quickly stopping the warper. This is accomplished by providing a continually movingactuator having means operable at a greater speed than'the speed of movement ot the vibrator to engage a knock-oil device which is normally supported by the con troller out of engagement with the actuator,

but is caused to engage the actuator by the yielding movement of the controller when caused by the arrest of the vibrating detector bar, asabove described.

A preferred form of mechanism for ire-- con'iplishing this purpose which is illustrated herein comprises a knock oit devrcein the form off a lever 29 which is pivotally mount ed at itsupper end upon a stud 30 at'on'e' end or" anarm 31which is pivota lly mounted upon a stud 32 upon a brackettilr secured to the OI'lClfltUllO. Lugs lit and 35 projecting 'from the bracket 33 limit the upward and downward movement of the arm 31, and consequently hunt the movement of the The lower cndo'f the lever knock-oil device. 2-9 provided with an offset portion v36 wl'iichpresents a shoulder resting upon an arcuate extension 37 of the controller 22.

The ol'lset portion 3601. the lever 29 is pro vided. with a laterally extending stud which is connected by a link 2:39 to the usual knock-oil lever-40 which knocks off the ship per 41. The lower end of the oilset por tion 36 of the lever 291s provided with a vertical shoulder 12 which is adapted to be: engaged by a member of a IIIOVIDg'HCtIUItOI which ope ates at a greater speed than the speed oi movement or" the vibrator. Preferabl f a rotatin actuator ,is emolo ed havin a l a one or more arms to'engage the shoulder 12 of the ltnoclcotl device and having such speed of rotation as may be required to pm:

vide a very quick actuation thereof. 1

In the preferred embodiment of the invention, the actuator comprlses a star wheel 43 fixedly secured upon a continuously rotatlngj shaft 44 and havinga series of arms 45, any

one of which may engagethe shoulder 12 of thehnoclsotf device when the latter i ill nee-6,363 1 of the vibrator 25 in either direction will cause immediate depression of the controller 22 against the action of its spring 26, thereby permittingor causing the detector device or lever 29 to be depressed so that its shoulder 42will be engaged by one of the arms as of the rotating actuator, so that the lever 29 will be swung upon its pivot 30 and the rod 39 caused to rock the knock-off lever 40, thereby releasing the shipper and causing immediate stoppage of the warper. By thus stopping the Warper in a relatively small fraction of the time required for the stoppage of the usual warper, there is much less run over of the yarn and crossing of the warps. Furthermore, the prompt stoppage of the warper enables the broken end to be more readily found for piecin Having thus described the invention, What is claimed as new, and desired to be secured by Letters Patent, is: c

I 1. Quick-acting warp stop mechanism for warpers comprising a detector bar, means for oscillating the same transversely of its length, a series of pivotally mounted drop wires operable when permitted to fall to arrest the detector bar, in either direction of its movement, a continually moving vibrator, ayieldable controller mounted on said vibrator, means engaging said controller normally acting to transmit an oscillating move ment therefrom to the detector bar, and operable upon arrest of said detector bar to cause said controller to yield during the movement of said vibrator in either direction and means operable by the yielding movement of said controller immediately to effect a stoppage of the Warper.

2. Quick-acting Warp stop mechanism for warpers comprising a detector bar, means for oscillating the same transversely of its length, a series of pivotally mounted drop wires operable when permitted to fall to arrest said detectorbar, a continually moving vibrator, a knock-off device, an actuator therefor having means operable at a greater speed than the speed of movement of said vibrator to actuate said knockoff device when engaged thereby and a yieldable controller mounted onsaid vibrator normally supporting said knock-off device out of engagement with said actuator and also acting to transmit an oscillatory movement to said detector bar fro-m said vibrator and operable upon arrest of the detector bar by a falling drop wire to cause said knocki-oif device to engage said actuator and thereby effect aprompt stoppage of the-wauper.

' Quick-acting warpstop 1 mechanism forwarpers comprising a transverse detector bar shaft havinga'a detector bar fixedly; secured thereto, aseries ofpivotally mounted drop wires eaclrhaving-means operable upon the falling of: the d'ropflvhe to engage and arrest saiddetector bar in either direction of its movement, acontinually moving vibrator, a yielding controller mounted thereon, relatively movable interengaging means con- Lin necting said: controller to said detector bar'- shaft actingnormally totransmit an oscillatory movementto said detector bar from- -SL1Cl vibrator, but operable upon arrest of the detector bar to causesaidcontroller to yield during the movement of the vibrator in either direction and means operableby suclryielding movement immediately to effect a stoppage of the w-arper.

4. Quick-acting warp stop mechanism for warpers comprising a transverse detector bar shaft-having a detector bar fixedly se-' cured thereto, a series of pivotally mounted drop Wires each having means operable upon the falling of the drop wire to engage and arrest said detector bar in either direction of its movement, a continually moving vibrator, a yielding controller mounted thereon having faces presenting a re-entrant angle, an arm fixedly secured to said detector bar shaft having means frictionally engaging said re-entrant angle and operable upon arrest of the detector bar by a falling drop Wire to ride up upon one of the Walls of said re-entrant angle and thereby cause saidcontroller to yield during either direction of movement of said vibrator and means operable by such yielding movement immediately to effect a stop'pageof the \varper. 1 5; Quick-acting warp stopmechanism for warpers comprising a transverse detector bar shaft having a detector bar fixedly secured thereto, a series of pivotally mounted drop Wires each having means operable upon the falling of the drop Wire to engage and arrest said detector bar in either direction of its movement, a continually moving vibrator, a knock-off device, an actuator therefor having means operable at a greater speed than the speed of movement of said vibrator to actuate said knock-off device when engaged thereby, a yielding cont-roller car ried by said vibrator normally supporting said knock-off device out of engagement with said actuator and having a face presenting a re-entrant angle, an arm fixedly secured to said detector bar shafthaving means frictionally engaging said ire-entrant angle and operable upon arrest of said detector bar to depress said controllerin either direction of movement of said vibrator whereby said knock-off device is caused to en 'a e said actuator and a nick sto'i a e C b 'O of the warper effected.

6. Quick-acting Warp stop mechanism for warpers comprising a transverse detector bar shaft having a detector bar'fixedly secured thereto, a series of pivotally-mounted drop wires each having means operable upon the falling of the drop wire to engage and arrest said detector bar in either direction of its movement, a continually moving vibrator, a knock-off device,a continuously rotating actuator having means operable at a greater speed thanthe speed of movement of said vibrator to actuate said knockoff device when engaged thereby, ayielding con troller carried by said vibrator normally supporting said knockoff device out of engagement with said actuator and having a face presenting a re-entrant angle, an arm fixedly secured to said detector bar having means to engage said re-entrant angle and operable upon the arrest of said detector bar to depress said controller and thereby cause said knock-off to engage said actuator,

whereby prompt stoppage of the warper will be effected. v

7. Quickacting Warp stop mechanism for warpers comprising an oscillatingdetector bar shaft having adetector bar rigidlyconnected'thereto and a depending arm, a series of drop wires cO-operating with the detector bar having means operable upon the falling of a drop Wire to engage and arrest the detector during either direction of its anovement, a continually moving vibrator, a downwardly yieldable controller carried by saidvibrator havinga face presenting a re-entrant angle frictionally engaging the depe'ndmg arm on said detector bar shaft and adapted to be depressed thereby upon arrest of the detector bar, a knock-oft de- ALONZO E. RI-IOADES. 

